Home / 2,129.28-3,195.30-761.28

Finding the Fourth Proportional to 2,129.28, 3,195.30 and 761.28

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Solution

The fourth proportional to 2,129.28, 3,195.30 and 761.28 is: 1,142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.28 : 3,195.30 = 761.28 : x
  2. Step 2: Convert to fraction form
    2,129.28/3,195.30 = 761.28/x
  3. Step 3: Cross multiply
    2,129.28x = 3,195.30 × 761.28
  4. Step 4: Simplify right side
    2,129.28x = 2,432,517.98
  5. Step 5: Solve for x
    x = 2,432,517.98/2,129.28
  6. Step 6: Final answer
    x = 1,142.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.